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United States Patent |
5,529,364
|
Vilsmeier
|
June 25, 1996
|
Motor vehicle seat with means for vertical and longitudinal adjustment
Abstract
In a motor vehicle seat with vertical and longitudinal adjustment, a holder
(9) is guided by guide rods (7; 8) which can pivot in parallel and are
pivotally connected to pivot points (5; 6) which are rigidly fixed to the
car body. The holder (9) supports two short guide rods (21; 23), the other
ends of which are, in each case, pivotally connected to two further long
guide rods (13; 19). The upper ends (12; 25) of the long guide rods (13;
19) are, in turn, pivotally connected to the seat frame (3) and the bottom
ends (15; 18) are directed in an upward direction. The short guide rods
(21; 23) are pivotally connected between the ends of the long guide rods
(13; 19).
Inventors:
|
Vilsmeier; Walter (Sperlingweg 1, 83558 Maithenbeth, DE)
|
Appl. No.:
|
244429 |
Filed:
|
May 26, 1994 |
PCT Filed:
|
September 22, 1993
|
PCT NO:
|
PCT/EP93/02564
|
371 Date:
|
May 26, 1994
|
102(e) Date:
|
May 26, 1994
|
PCT PUB.NO.:
|
WO94/11217 |
PCT PUB. Date:
|
May 26, 1994 |
Foreign Application Priority Data
| Nov 13, 1992[DE] | 42 38 458.3 |
Current U.S. Class: |
296/65.05; 248/421; 297/344.15 |
Intern'l Class: |
B60N 002/04 |
Field of Search: |
296/65.1
297/344.15,344.17,344.1,344.13
248/293,421
|
References Cited
U.S. Patent Documents
2942647 | Jun., 1960 | Pickles | 155/14.
|
3022035 | Feb., 1962 | Pickles | 248/395.
|
3037735 | Jun., 1962 | Matthews | 248/394.
|
Foreign Patent Documents |
0445528 | Sep., 1991 | EP.
| |
0445086 | Nov., 1991 | EP.
| |
2195202 | Mar., 1974 | FR.
| |
Primary Examiner: Mitchell; David M.
Assistant Examiner: Robinson; Kia M.
Attorney, Agent or Firm: Pollock, Vande Sande & Priddy
Claims
I claim:
1. Motor vehicle seat with means for vertical and longitudinal adjustment,
comprising
a holder which is guided by guide rods pivotable in parallel;
guide rod pivot points rotational supporting said guide rods, said guide
rods pivots points being rigidly fixed to a car body;
two short guide rods having first and second ends, the first end being
supported by said holder;
two long guide rods having upper and lower ends, said long guide rods being
pivotally connected to the second ends of said two short guide rods
between the ends of said long guide rods, the lower ends being directed in
an upward direction; and
a seat frame pivotally connected to the upper ends of said long guide rods.
2. Motor vehicle seat according to claim 1, wherein the short guide rods
are pivotally connected to the center of the long guide rods.
3. Motor vehicle seat according to claim 1 further comprising directing
guide rods, extending in divergent directions from a common pivot point on
the holder, upwardly directed lower ends of said long guide rods in an
upward direction.
4. Motor vehicle seat according to claim 1 wherein spacing between said
upper ends of said long guide rods connected to the seat frame
substantially corresponds to spacing between pivot points located where
the short guide rods connect to the holder.
5. Motor vehicle seat according to claim 1 wherein the spacing between a
pivotal connection at the upper ends of the long guide rods and a point at
which the second ends of said two short guide rods are connected to said
long guide rods is equal to the spacing between pivot points at each end
of said two short guide rods.
6. Motor vehicle seat according to claim 1 wherein the lower ends of the
long guide rods are guided at least substantially parallel to each other.
7. Motor vehicle seat according to claim 2 further comprising directing
guide rods, extending in divergent directions from a common pivot point on
the holder, upwardly directed lower ends of said long guide rods.
8. Motor vehicle seat according to claim 2 wherein spacing between said
upper ends of said long guide rods connected to the seat frame
substantially corresponds to spacing between pivot points located where
the short guide rods connect to the holder.
9. Motor vehicle seat according to claim 3 wherein the spacing between
pivotal connections at upper ends of the long guide rods on the seat frame
substantially corresponds to the spacing between pivot points where the
holder supports the first ends of the two short guide rods.
10. Motor vehicle seat according to claim 4 wherein the spacing between a
pivotal connection at the upper ends of the long guide rods and a point at
which the second ends of said two short guide rods are connected to said
long guide rods is equal to the spacing between pivot points at each end
of said two short guide rods.
11. Motor vehicle seat according to claim 5 wherein the lower ends of the
long guide rods are guided at least substantially parallel to each other.
Description
TECHNICAL FIELD
The present invention relates to a motor vehicle seat with means for
vertical and longitudinal adjustment.
BACKGROUND ART
Conventional longitudinal adjustment devices of motor vehicle seats are
composed of slide rails. Such slide rails have numerous drawbacks. They
necessitate a high degree of finishing work. It is also difficult to
adhere to the required tolerances.
SUMMARY OF THE INVENTION
The present invention is based on the object of providing a motor vehicle
seat of the known type, which permits both a vertical adjustment as well
as a longitudinal adjustment using simple means.
This object is achieved by a motor vehicle seat with means for vertical and
longitudinal adjustment, in which a holder is guided by guide rods which
can pivot in parallel and are pivotally connected to pivot points which
are rigidly fixed to the car body, the holder supporting two short guide
rods, the other ends of which are, in turn, pivotally connected to the
seat frame and the bottom ends are directed in an upward direction, the
short guide rods being pivotally connected between the lends of the long
guide rods. The short guide rods may be pivotally connected to the center
of the long guide rods. The upwardly directed bottom ends of the long
guide rods may be guided in an upward direction by means of guide rods
which are directed in divergent directions from a common pivot point on
the holder. The spacing between the pivot points of the long guide rods on
the seat frame conveniently substantially corresponds to the spacing
between the pivot points of the short guide rods on the holder. The
spacing between the top pivot point of the long guide rods and the pivot
point of the short guide rods may be equal to the spacing between the two
pivot points on the holder. The bottom hinge points of the long guide rods
may be guided at least substantially parallel to each other.
The above device according to the present invention is economical and
relatively light-weight, when compared to known adjustment devices.
BRIEF DESCRIPTION OF THE DRAWING
The invention is described hereinafter in detail with reference to the
drawing, in which:
FIG. 1 shows a diagrammatic arrangement of the present invention seat in a
forward end position; and
FIG. 2 shows the seat according to FIG. 1 in a rear end position.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT(S)
Two guide rods 7 and 8 are pivotally connected to two bearing points 5 and
6 which are rigidly fixed to the car body. The front hinge points 10 and
11 of the guide rods 7, 8 support a triangular holder 9. The triangular
holder 9 comprises three hinge points 10, 22 and 24 which are arranged in
the corners of an isosceles or equal-sided triangle.
Short guide rods 21 and 23 which, in turn, are connected to long guide rods
13 and 19, respectively, via hinge points 14 and 20, project from the
hinge points 22 and 24. The upper ends of the long guide rods 13 and 19
are pivotally connected to the hinge points 12 and 25 on the frame 3 of
the seat. The seat frame 3 supports the seat upholstery 1. The backrest
support 4, comprising the backrest upholstery 2, is pivotally connected to
the seat frame 3.
The long guide rods 13 and 19 are directed upwardly from their lower hinge
points 15 and 18. In the illustrated exemplified embodiment, the
approximate parallel guiding is provided by means of the guide rods 17 and
16 which are pivotally connected to the hinge point 10 of the holder 9.
It is also possible to direct the hinge points 15 and 18 in an upward
direction along corresponding optionally linear and parallel or curved and
parallel path.
The relevant guide rods for the vertical adjustment are the fixedly hinged
guide rods 7 and 8. They transmit their pivoting movement to the holder
which, via the guide rods attached thereto, conjointly moves the seat
frame in an upward or downward direction.
The functioning of the longitudinal adjustment becomes clear if, in this
instance, the holder 9 is visualized in a fixed predetermined position.
The short guide rods 21 and 23 pivot along the indicated
circular-arc-shaped pivot path into the position shown in FIG. 2. In so
doing, they move the long guide rods 13 and 19 along, into the position
illustrated in FIG. 2, with the result that the pivot points 12 and 25 are
moved on a virtually linear running track 30. In the course of the
described movement, the guide rods 16 and 17, which ensure that the hinge
points 15 and 18 are guided substantially parallel, also pivot about their
common pivot points 10 on holder 9.
It is possible to provide an additional adjustment of the inclination of
the seat frame 3, in that the spacing between the pivot point 11 and the
pivot point 5, or the spacing between the hinge points 6 and 10, is
provided to be variable.
The above could be provided, for example, by a longitudinally variable
design of the guide rod 7 or 8.
A relocation of the spacing of the pivot points 11 and 5 or 10 and 6 is
also possible if a crankshaft is supported in points 10 and/or 11, the
bearing journal of which crankshaft is arranged at points 10 and/or 11 and
the crank pin of which supports the end of the guide rods 7 or 8,
respectively. A rotation of the crankshaft or of the crank brings about
changes in the spacing between the pivot points 11 and 5 or 10 and 6,
respectively.
The guide rods linkage illustrated on the left-hand side of the seat in the
Figures of the drawing is provided, with an identical design and
arrangement, in each case, on the right-hand side of the seat.
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